External USB drive not found after 8.10 install

[cfraenkel]

I've an external USB HD that worked fine up until 8.10

After installing 8.10, no usb drive shows up, & there is a sequence of

Nov 28 14:29:54 ancho kernel: [ 5712.335845] sd 5:0:0:0: [sdb] Sense Key : No Sense [current]
Nov 28 14:29:54 ancho kernel: [ 5712.335858] sd 5:0:0:0: [sdb] Add. Sense: No additional sense information

repeated continuously in /var/log/syslog

lsusb reports:
Bus 005 Device 004: ID 2116:0320
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 0451:1446 Texas Instruments, Inc. TUSB2040/2070 Hub
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

[xteejx (xteejx)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it without more information.

Please include the information requested at https://help.ubuntu.com/community/DebuggingUSBStorage as separate attachments.